CN112105511A

CN112105511A - Pneumatic tire

Info

Publication number: CN112105511A
Application number: CN201980031654.1A
Authority: CN
Inventors: 曽根直幸
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2018-05-14
Filing date: 2019-04-23
Publication date: 2020-12-18
Also published as: US20210213783A1; JP7048175B2; JP2019199108A; WO2019220887A1; EP3795379A4; EP3795379A1

Abstract

A pneumatic tire includes: a pair of bead cores; a carcass formed across a pair of bead cores; a belt layer formed by spirally winding a coating cord formed by coating a cord with a resin on the outer side of the carcass in the tire radial direction; and a reinforcing member disposed across a tire width direction end of the belt layer on a tire radial direction outer side of the belt layer.

Description

Pneumatic tire

Technical Field

The present disclosure relates to a pneumatic tire having a belt layer.

Background

Jp-a-10-35220 discloses a pneumatic radial tire in which a belt reinforcing layer made of a thermoplastic resin is disposed at an edge portion of a belt layer. In this pneumatic radial tire, the belt reinforcing layer is disposed so that the position of the widthwise end thereof coincides with the position of the widthwise end of the belt layer. Alternatively, the belt reinforcing layer is formed in a shape of japanese kana コ in cross section, and is disposed so as to sandwich the belt layer from the outer circumferential side (outer side in the tire radial direction) and the inner circumferential side (inner side in the tire radial direction).

Disclosure of Invention

Problems to be solved by the invention

In the pneumatic radial tire of japanese patent application laid-open No. 10-35220, an edge portion (tire width direction outer side end portion) of a belt layer is reinforced by a belt reinforcing layer, and the belt reinforcing layer is not disposed at a position further to the tire width direction outer side than the belt layer. Therefore, a rigidity step is generated between a position on the inner side and a position on the outer side of the belt layer with respect to the tire width direction outer side end. This may cause stress to concentrate on the edge of the belt layer, which may affect the durability of the tire.

In view of the above circumstances, an object of the present disclosure is to provide a pneumatic tire including a reinforcing member that reinforces a belt layer and is less likely to cause a difference in rigidity.

Means for solving the problems

The pneumatic tire according to claim 1 comprises: a pair of bead cores; a carcass formed astride the pair of bead cores; a belt layer formed by spirally winding a coating cord formed by coating a resin on a cord in a tire circumferential direction on the outer side of the carcass in the tire radial direction; and a reinforcing member disposed across a tire width direction end of the belt layer on a tire radial direction outer side of the belt layer.

According to the pneumatic tire of claim 1, the belt layer is formed by coating the cord with a resin. The belt layer formed using a resin has an improved ring stiffness as compared with, for example, a belt layer formed using rubber instead of a resin. Therefore, the tread is less likely to deform out of the plane of the annular surface along the tire circumferential direction and the tire width direction, and deformation of the pneumatic tire is suppressed.

Further, the in-plane (i.e., in-annular plane along the tire circumferential direction and the tire width direction) shear stiffness of the belt layer formed using the resin is improved as compared with the belt layer formed using the rubber. Therefore, for example, in the case of cornering or the like, the tread is less likely to deform in the plane with respect to the shear force acting in the tire width direction. This can omit the cross belt layer, thereby reducing the weight of the tire and improving the steering stability during internal pressure running.

Further, by forming the coated cord by spirally winding it in the tire circumferential direction, the loop stiffness of the belt layer is improved as compared with the case where a plurality of coated cords are formed in a line. This further suppresses the tread from deforming out of plane. Therefore, the pneumatic tire can be reduced in weight while securing the hydraulic strength. Further, since it is not easy for the cord ends to be exposed at the belt ends, for example, like the cross belt layer, peeling or the like is not easy to occur at the belt ends.

Further, a reinforcing member is disposed at a tire width direction end portion of the belt layer. Therefore, the tire width direction end portion of the belt layer can be suppressed from being deformed. Since the reinforcing member is disposed across the tire width direction end portion of the belt layer, the reinforcing member reinforces the inner and outer sides (i.e., the outer and inner sides in the tire width direction) of the tire width direction end portion of the belt layer. Thereby, the change in the stiffness of the pneumatic tire in the tire width direction becomes gentle as compared with, for example, a case where the positions of the tire width direction ends of the reinforcing member coincide with the positions of the tire width direction ends of the belt layer. And thus a rigidity step is not easily generated.

In the pneumatic tire according to claim 2, the reinforcing member covers at least the tire circumferential direction end portion of the covered cord.

According to the pneumatic tire of claim 2, since the reinforcing member covers the tire circumferential direction end portion of the covered cord, the belt layer can be efficiently reinforced.

When the tread and the belt generate heat or receive pressure from the inner side in the tire radial direction at the time of tire manufacturing or the like, the coated cord tries to expand along the tire circumferential direction line. At this time, the resin coated cords adjacent in the tire width direction restrain mutual expansion from each other.

However, the outermost coated cord in the tire width direction receives a restraining force only from the inner side in the tire width direction. Further, since the tread suppresses the diameter growth of the coating cord, deformation in the circumferential direction is concentrated on the tire circumferential direction end portion of the coating cord.

Therefore, the deformation of the tire circumferential direction end portion of the coated cord is larger than that of the other portion. By reinforcing the tire circumferential direction end portion having a large deformation with the reinforcing member, the tire circumferential direction end portion can be suppressed from peeling from the other portion of the covered cord.

In the pneumatic tire according to claim 3, an inclination angle of the coated cord with respect to the tire circumferential direction in the tire equatorial plane is set to 2 ° or less.

According to the pneumatic tire of claim 3, the inclination angle of the covered cord is closer to the circumferential direction than in the case where the inclination angle of the covered cord with respect to the tire circumferential direction is larger than 2 °. Therefore, the coated cord functions as a hoop (hoop) and can suppress out-of-plane deformation of the tread.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the pneumatic tire of the present disclosure, the reinforcing member is less likely to generate a step in rigidity while reinforcing the belt layer.

Drawings

Fig. 1 is a half sectional view showing a state in which a pneumatic tire according to an embodiment of the present disclosure is cut along a tire width direction and a tire radial direction.

Fig. 2 is a perspective view showing the structure of a belt layer of a pneumatic tire according to an embodiment of the present disclosure.

Fig. 3A is a cross-sectional view showing a belt layer of a pneumatic tire according to an embodiment of the present disclosure.

Fig. 3B is a cross-sectional view showing a modification in which two reinforcing cords are embedded in one resin coated cord in the pneumatic tire according to the embodiment of the present disclosure.

Fig. 4 is a half sectional view showing a modification in which a belt layer is formed in two layers in the pneumatic tire according to the embodiment of the present disclosure.

Fig. 5 is a partially enlarged plan view showing a cap ply of a pneumatic tire according to an embodiment of the present disclosure.

Detailed Description

Fig. 1 shows a single side of a section plane (i.e., a section viewed from a direction along the tire circumferential direction) of a pneumatic tire (hereinafter referred to as "tire 10") of an embodiment of the present disclosure, which is cut along the tire width direction and the tire radial direction. In the figure, arrow W indicates the width direction of the tire 10 (tire width direction), and arrow R indicates the radial direction of the tire 10 (tire radial direction). The tire width direction referred to herein means a direction parallel to the rotation axis of the tire 10. Further, the tire radial direction refers to a direction orthogonal to the rotation axis of the tire 10. Further, reference symbol CL denotes an equatorial plane (tire equatorial plane) of the tire 10.

In the present embodiment, the side closer to the rotation axis of the tire 10 in the tire radial direction is referred to as "inner side in the tire radial direction", and the side farther from the rotation axis of the tire 10 in the tire radial direction is referred to as "outer side in the tire radial direction". On the other hand, the side closer to the tire equatorial plane CL in the tire width direction is referred to as "inner side in the tire width direction", and the side farther from the tire equatorial plane CL in the tire width direction is referred to as "outer side in the tire width direction".

(tire)

Fig. 1 shows a tire 10 assembled to a rim 30 as a standard rim and filled with standard air pressure. The "standard rim" as used herein refers to a rim specified by the Year 2017 edition of Year Book of JATMA (japan automobile tyre association). The standard air pressure refers to an air pressure corresponding to the maximum load capacity of Year Book2017 edition of JATMA (japan automobile tire society).

As shown in fig. 1, the tire 10 includes a pair of bead portions 12, a carcass 14 having ends anchored to the bead cores 12A embedded in the respective bead portions 12, a bead filler 12B embedded in the bead portions 12 and extending from the bead cores 12A outward in the tire radial direction along the outer surface of the carcass 14, a belt 40 provided outward in the tire radial direction of the carcass 14, a cap ply 50 disposed outward in the tire radial direction of the belt 40 across the ends 40EW in the tire width direction of the belt 40, and a tread 60 provided outward in the tire radial direction of the belt 40 and the cap ply 50. In fig. 1, only one side bead portion 12 is shown.

(bead portion)

A bead core 12A as a wire harness is embedded in each of the pair of bead portions 12. The carcass 14 spans the bead core 12A described above. The bead core 12A can have various configurations such as a circular cross section and a polygonal cross section. The polygon may be a hexagon, for example, but in the present embodiment, the polygon is a quadrangle.

A bead filler 12B extending outward in the tire radial direction from the bead core 12A is embedded in a region surrounded by the carcass 14 locked to the bead core 12A in the bead portion 12.

(carcass)

The carcass 14 is a tire frame member formed by coating a plurality of cords with a coating rubber. The carcass 14 extends in a ring shape from one bead core 12A to the other bead core 12A to constitute a carcass of the tire. Further, the end portion side of the carcass 14 is caught to the bead core 12A. Specifically, the carcass 14 is locked by folding back the end portion side thereof around the bead core 12A from the inner side in the tire width direction to the outer side in the tire width direction.

In the present embodiment, the carcass 14 is a radial carcass. The material of the carcass 14 is not particularly limited, and rayon, nylon, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), aramid, glass fiber, carbon fiber, steel, or the like can be used. In addition, from the viewpoint of weight reduction, an organic fiber cord is preferable. The weft density of the carcass is in the range of 20 to 60/50 mm, but is not limited to this range.

A sidewall rubber 16 is provided on the outer side of the carcass 14 in the tire width direction. The sidewall rubber 16 extends outward in the tire radial direction from the bead portion 12 to form a sidewall portion 10A of the tire 10, and is joined to the tread 60. Further, the side wall rubber 16 is formed so that its thickness is gradually reduced at the shoulder portion 10B. The end 16E of the side rubber 16 is disposed on the inner side of the belt layer 40 in the tire radial direction, which will be described later, and on the inner side in the tire width direction than the tire width direction end 40EW of the belt layer 40.

The end 16E of the side rubber 16 may be disposed outside the tire width direction end 40EW of the belt 40. In this case, the tire width direction end 40EW of the belt layer 40 is arranged not to contact with the side rubber 16 but to contact with the outer peripheral surface of the carcass 14. The end 16E of the side rubber 16 may be disposed outside the tire width direction end 50EW of the band 50 described later. In this case, the tire width direction end 50EW of the cap ply 50 is arranged not to contact the side rubber 16 but to contact the outer peripheral surface of the carcass 14.

(Belt layer)

A belt layer 40 is disposed on the outer side of the carcass 14 in the tire radial direction. As shown in fig. 2, the belt layer 40 is an annular hoop (hoop) formed by spirally winding one resin-coated cord 42 around the outer circumferential surface of the carcass 14 in the tire circumferential direction. Both ends 42E1, 42E2 of the resin coated cord 42 are disposed at different positions in the tire circumferential direction. The "spiral shape" indicates a state in which one resin coated cord 42 is wound around the carcass 14 at least once.

As shown in fig. 3A, the resin coated cord 42 is formed by coating the reinforcing cord 42C with a coating resin 42S, and has a substantially square cross section. The coating resin 42S is bonded to the outer peripheral surfaces of the carcass 14 and the side wall rubber 16 disposed on the inner side in the tire radial direction via rubber and an adhesive.

Further, the covering resins 42S adjacent in the tire width direction are integrally joined to each other by thermal welding, an adhesive, or the like. Thereby, a belt layer 40 (resin-coated belt layer) in which the reinforcing cords 42C are coated with the coating resin 42S is formed. As shown in fig. 2, the end faces of the reinforcing cord 42C are exposed at the end portions 42E1, 42E2 of the resin-coated cord 42. The ends 42E1 and 42E2 of the resin coated cord 42 are formed substantially at right angles to the longitudinal direction of the resin coated cord.

The resin material used for the coating resin 42S is a thermoplastic resin. However, the embodiments of the present disclosure are not limited thereto, and for example, engineering plastics (including super engineering plastics) and the like can be used as the resin material in addition to general-purpose resins such as thermoplastic elastomers, thermosetting resins, and (meth) acrylic resins, EVA resins, polyvinyl chloride resins, fluorine-based resins, silicone-based resins, and the like. In addition, the resin material here does not contain vulcanized rubber.

The thermoplastic resin (including the thermoplastic elastomer) is a polymer compound which is softened and fluidized at the same time as the temperature is increased, and becomes relatively hard and has a strong state when cooled. In the present specification, a polymer compound having rubber-like elasticity, which is in a state of relatively hard and strong when cooled after the material is softened and fluidized at the same time as the temperature is referred to as a thermoplastic elastomer. A thermoplastic resin which is not an elastomer is a polymer compound which softens and flows at the same time as the temperature rises, becomes relatively hard when cooled, has a strength, and does not have rubber elasticity, and is distinguished from a thermoplastic elastomer.

Examples of the thermoplastic resin (including the thermoplastic elastomer) include a polyolefin-based thermoplastic elastomer (TPO), a polystyrene-based thermoplastic elastomer (TPS), a polyamide-based thermoplastic elastomer (TPA), a polyurethane-based thermoplastic elastomer (TPU), a polyester-based thermoplastic elastomer (TPC), a dynamic cross-linked thermoplastic elastomer (TPV), a polyolefin-based thermoplastic resin, a polystyrene-based thermoplastic resin, a polyamide-based thermoplastic resin, and a polyester-based thermoplastic resin.

The thermosetting resin is a polymer compound which forms a three-dimensional mesh structure and is cured while the temperature rises, and examples thereof include phenol resin, epoxy resin, melamine resin, and urea resin.

The reinforcing cords 42C of the belt layer 40 of the present embodiment are steel cords. The steel cord can contain various trace contents such as carbon, manganese, silicon, phosphorus, sulfur, copper, chromium, and the like, with steel as a main component.

In addition, the embodiment of the present disclosure is not limited to this, and instead of the steel cord, a monofilament cord or a cord obtained by twisting a plurality of filaments may be used as the reinforcing cord 42C of the belt layer 40. In addition, organic fibers such as aramid fibers, carbon fibers, and the like may also be used. Various designs of the twist structure are possible, and various designs of the cross-sectional structure, twist pitch, twist direction, and distance between adjacent filaments can be used. Further, a cord obtained by twisting filaments of different materials may be used, and the cross-sectional structure is not particularly limited, and various twisted structures such as single twist, layer twist, and double twist may be adopted.

(Cap ply)

As shown in fig. 1, a cap ply 50 is disposed on the tire radial direction outer side of the belt layer 40. The cap ply layer 50 is disposed at each of both ends of the belt layer 40 on one side in the tire width direction and the other side in the tire width direction. The cap ply layer 50 is a reinforcing member (reinforcing layer) for reinforcing the belt layer 40, and is disposed across the tire width direction end 40EW of the belt layer 40.

The cap ply layer 50 is formed by winding a band-shaped member (reinforcing member) 50A (see fig. 5) having a constant width and including a plurality of fiber cords linearly less than one turn (not more than one turn) in the tire circumferential direction. The band-shaped member 50A does not have overlapping portions where the longitudinal ends overlap each other. That is, the cap ply layer 50 is provided at one layer or less in the entire tire circumferential direction.

As the fiber cord used for the cap ply layer 50, for example, an organic fiber cord such as nylon, polyester, and aramid can be used. Further, steel cords can also be used. In addition, a known cap ply material used for a general pneumatic tire can be used. The cap ply layer 50 of the present embodiment includes a plurality of fiber cords, but may be formed of a sheet-like member containing no fiber resin material alone or rubber alone, for example.

It is also preferable that the bending rigidity of the cap ply 50 is set to be equal to or less than the bending rigidity of the belt 40 so as to follow the deformation of the tread. The cords of the cap ply layer 50 are covered with rubber or resin, but it is preferable to select a material having little thermal shrinkage (or thermal expansion) as the resin. Examples of the material having a low thermal shrinkage include crystalline resins such AS EVA, PET, and PPS, and amorphous resins such AS ABS, PS, AS, PC, PVC, and PMMA. In addition, the above thermosetting resin can also be used. The thermosetting resin has less thermal shrinkage after curing.

As shown in fig. 5, the width W1 of the belt member 50A constituting the cap ply layer 50 is formed to be wider than the width W2 of the resin coated cord 42 constituting the belt layer 40. The end of the belt-like member 50A in the longitudinal direction is cut at right angles to the longitudinal direction of the belt-like member 50A, but may be cut obliquely to the longitudinal direction of the belt-like member 50A.

The tire width direction one-side cap ply layer 50 covers the one-side end portion 42E1 of the resin coated cord 42 and a portion of the resin coated cord 42 adjacent to the width direction inner side of the end portion 42E 1. The other side cap ply layer 50 on the tire width direction covers the other side end 42E2 of the resin coated cord 42 and a part of the resin coated cord 42 adjacent to the inner side of the end 42E2 in the width direction.

The width of the band layer 50 may be made wider, and the band layer 50 may be provided so as to cover the entire resin coated cord 42 disposed on the inner side in the width direction of the end portions 42E1, 42E 2.

(Tread)

A tread 60 is provided on the tire radial direction outer side of the belt 40 and the cap ply 50. The tread 60 is a portion that comes into contact with a road surface during running, and a plurality of circumferential grooves 62 extending in the tire circumferential direction are formed in the contact surface of the tread 60. The shape and number of the circumferential grooves 62 are appropriately set in accordance with performance such as drainage performance and steering stability required for the tire 10.

(action)

According to the tire 10 of the present embodiment, the belt layer 40 is formed by coating the reinforcing cords 42C with the coating resin 42S, which is a thermoplastic resin. The belt layer 40 formed using a thermoplastic resin has an improved ring stiffness as compared with, for example, a belt layer formed using rubber instead of a thermoplastic resin. Therefore, the tread 60 is less likely to deform out of the plane of the annular surface along the tire circumferential direction and the tire width direction, and deformation of the tire 10 is suppressed.

Further, the in-plane (i.e., in-annular in the tire circumferential direction and the tire width direction) shear rigidity of the belt layer 40 formed using a thermoplastic resin is improved as compared with the belt layer formed using rubber. Therefore, for example, in the case of cornering, the tread 60 is less likely to deform in the plane with respect to the shear force acting in the tire width direction. This can omit the cross belt layer, thereby reducing the weight of the tire and improving the steering stability during internal pressure running.

Further, by forming the resin coated cord 42 in a spiral winding manner in the tire circumferential direction, the loop stiffness of the belt layer is improved as compared with the case where a plurality of coated cords are formed in an aligned manner. Thereby further suppressing the tread 60 from deforming out-of-plane.

Further, a cap ply 50 is disposed at the tire width direction end portion of the belt layer 40. Therefore, the tire width direction end portion of the belt layer 40 can be suppressed from being deformed. The cap ply layer 50 is disposed across the tire width direction end 40EW of the belt layer 40. Thus, the cap ply layer 50 reinforces the inner and outer sides (i.e., the outer and inner sides in the tire width direction) of the tire width direction end portion 40EW of the belt layer 40. Thereby, the change in the stiffness in the tire width direction of the tire 10 becomes gentle as compared with, for example, a case where the position of the tire width direction end of the cap ply layer 50 coincides with the position of the tire width direction end 40EW of the belt layer 40. Therefore, a rigidity step is not easily generated.

The cap ply layer 50 is formed in one layer or less in the tire circumferential direction, and no lap portion is formed. Therefore, formation of a portion having extremely high rigidity in the tire circumferential direction can be suppressed. This can suppress the occurrence of a rigidity step in the tire circumferential direction.

In the tire 10 of the present embodiment, the inclination angle of the resin coated cord 42 with respect to the tire circumferential direction in the tire equatorial plane is set to 2 ° or less. Therefore, the inclination angle of the resin coated cord 42 is closer to the circumferential direction than in the case where the inclination angle of the resin coated cord 42 with respect to the tire circumferential direction is larger than 2 °. Therefore, the resin coated cord 42 functions as a hoop (hoop) and can suppress out-of-plane deformation of the tread 60. In addition, creep of the coating resin 42S at high internal pressure can be suppressed.

In the present embodiment, the band layer 50 as the reinforcing member is formed by winding the band member 50A linearly more than once (i.e., one or more times) in the tire circumferential direction, but the embodiment of the present disclosure is not limited thereto. The reinforcing member may be, for example, a reinforcing member 50B shown by a one-dot chain line in fig. 5, which covers at least the tire circumferential end portions 42E1, 42E2 of the resin coated cord 42. This enables the belt layer 40 to be reinforced efficiently.

When the tread 60 and the belt 40 generate heat or receive pressure from the tire radial direction inner side at the time of tire manufacturing or the like, the resin coated cord 42 tries to expand along the tire circumferential direction line. At this time, since the resin coated cords 42 adjacent in the tire width direction are bonded to each other, the mutual expansion is restrained.

However, the resin coated cord 42 on the outermost side in the tire width direction receives a restraining force only from the inner side in the tire width direction. Further, since the tread 60 suppresses the diameter growth (i.e., the increase in curvature) of the resin coated cord 42, the deformation in the circumferential direction is concentrated on the tire circumferential direction end portions 42E1, 42E2 of the resin coated cord 42.

Therefore, the deformation of the tire circumferential direction end portion of the resin coated cord 42 is larger than that of the other portion. By reinforcing the circumferential end portions 42E1, 42E2, which are largely deformed, with the reinforcing member 50B, it is possible to suppress the circumferential end portions 42E1, 42E2 from peeling from other portions of the resin coated cord 42.

Further, in the present embodiment, the belt layer is formed of one layer, but the embodiments of the present disclosure are not limited thereto, and two or more layers may be provided.

For example, as shown in fig. 4, the cross belt layer 46 may be provided on the outer side of the belt layer 40 in the tire radial direction. As a material of the coated reinforcing cords (not shown) in the cross belt layer 46, rubber or resin may be used. That is, when a plurality of belt layers are provided, a resin may be used as a material for covering the reinforcing cords in at least one layer.

The tire width direction end 46EW of the intersecting belt layer 46 is formed on the tire width direction inner side than the tire width direction end 40EW of the belt layer 40. In the case where a plurality of belt layers are provided in this way, it is preferable to arrange the belt layers (the belt layer 40 and the intersecting belt layer 46) so as to shift the positions of the ends in the tire width direction, in order to smooth the change in rigidity.

Further, it is more preferable that the tire width direction end 46EW of the belt layer (crossing belt layer 46) disposed on the outer side in the tire radial direction is disposed on the inner side in the tire width direction than the tire width direction end 40EW of the belt layer (belt layer 40) disposed on the outer side in the tire radial direction.

Further, the cap ply layer 50 is preferably disposed across the tire width direction end 46EW of the intersecting belt layer 46 and the tire width direction end 40EW of the belt layer 40. This can reinforce the intersecting belt layer 46 and the belt layer 40 and suppress the occurrence of a rigidity step.

In the present embodiment, the belt layer 40 is formed by winding a substantially square resin coated cord 42 formed by coating one reinforcing cord 42C with a coating resin 42S around the outer circumferential surface of the carcass 14, but the embodiment of the present disclosure is not limited thereto.

For example, as shown in fig. 3B, the belt layer 40 may be formed by winding a resin coated cord 44 having a substantially parallelogram cross section, which is formed by coating a plurality of reinforcing cords 44C with a coating resin 44S, around the outer circumferential surface of the carcass 14.

As long as the resin coated cord 42 is wound at least once around the carcass 14 (that is, wound in a spiral shape), only one resin coated cord 42 may be used, or two or more resin coated cords may be used, for example. As such, the present disclosure can be embodied in various forms.

The disclosure of Japanese patent application No. 2018-093002 filed on 5, 14.2018 is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described in the present specification are incorporated herein by reference, and the incorporation of each document, patent application, and technical standard by reference is equivalent to the specific and separate description thereof.

Claims

1. A pneumatic tire, wherein,

the pneumatic tire includes:

a pair of bead cores;

a carcass formed astride the pair of bead cores;

a belt layer formed by spirally winding a coating cord formed by coating a cord with a resin on the outer side of the carcass in the tire radial direction; and

a reinforcing member disposed across a tire width direction end of the belt layer on a tire radial direction outer side of the belt layer.

2. The pneumatic tire of claim 1,

the reinforcing member covers at least a tire circumferential end portion of the coated cord.

3. The pneumatic tire according to claim 1 or 2,

in the tire equatorial plane, the inclination angle of the coated cord with respect to the tire circumferential direction is set to 2 ° or less.